Grindstone-frame



(Model.) I v L. MQDBVRMOTT.

GRI-NDSTONE FRAME.

' No. 308,086. Patented Nov. 1 1884.

WITNESSES: INVENTOR J ecu/Z M 421mm. a?

' I ATTORNEY n. Puma Phutn-lilhognpho wms n nnnnn c,

STATES UNITE I LAWRENCE MODERMOTT, OF CLEVELAND, OHIO.

GRINDSTONE-FRAME.

SPECIFICATION forming part of Letters Patent NO. 308,086, dated November 18, 1884-.

Application filed December :26, 1883. (ModeL) stone-Frames, of which the following is a specification.

This invention relates to certain new and useful improvements in grindstone-frames in which angle-iron is the material employed in their construction; and these improvements consist in the peculiar construction of the two side supports, each formed from a single piece of angle-iron, and the uniting of said two side supports by. strong flat crossbars, whereby great rigidity and stiffness are obtained.

The objects of the invention are to provide a cheap, simple, and strong frame having advantages not possessed by any other frames now in use, as hereinafter fully described and claimed.

Referring to the drawings, Figure l is a perspective view, Fig. 2 is a side elevation, and Fig. 3 an end elevation, of my frame.

. A represents the aforesaid side supports comprising my frame for supporting a revolving grindstone, B. This side support I construct from one piece of angle-iron, shaping the top portion down to the bend, where the two sides areunited by a wide flat crossbar, O, perpendicular or at right angles to the axis of the stone, making a level surface, both lengthwise and crosswise, for the bearings of the stone-shaft. This upper level portion is 'made short enough before reaching the first bend to allow the stone to project beyond the upper corners of the frame. The sides-of the frame are thus made perpendicular and parallel down about half-way, or to the point where the cross-pieces O are secured. From the upper side of said cross bars the side pieces are bent to spread the legs laterally or sidewise, thus making the legs to diverge for the purpose of giving the frame a broad foundation to make it set firmly on the floor or ground. The flat cross bar plates 0 are made slanting on their ends, to fit snugly into the slant of the legs, and are firmly riveted thereto. This braces and gives great stiffness and solidity to the frame, and avoids springing.

The sides are also strengthened by a longitudinal side bar, E, which also extends about two inches beyond the leg of the frame, and to which a treadlebar, F, is pivoted. The end of said bar is beveled to form a bearing for-the bar against said side bar. This serves as a guide for the bar to keep its front end from interfering.

The superior advantages of this frame are, first, the capability of closely nesting them together, making very compact bundles, thus being much less bulky, requiring much less room for storage, and convenience and economy in shipment, making it practically a knockdown frame without the disadvantages of knockdown frames, as there are no separa ble parts other than the removal of the stone and its shaft. The second advantage is that the cross-bars O being low down and the top portion of the frame short allows the store to project, giving freedom for sharpening reaper-knives, so that the grinder can use the corner of the stone forgrinding two sides of a sickle at once without the upper corner of the frame interfering.

Having described my invention, I claim as follows:

1. In a grindstone -frame, the two side supports, A, formed of a single piece of angle-iron, and united by wide cross-bars O, the parts of the side supports forming thelegs of the frame being bent just above said crossbars to diverge the legs fromeach other below said bends, and the upper part above said bends being parallel with each other, substantially as described.

Y 2. A grindstone-frame consisting of two side supports, A, each formed of a single piece of angle-iron, cross-pieces O, and treadle-bar F, attached to one side of said supports, the parts of the side supports below the upper edges of said cross pieces and forming the legs of the frame being divergent from each other,

and theupper part of said supports being parallel with each other, substantially as described.

LAWRENCE MODERMOTT. Witnesses:

E. W. LAIRD, GEO. W. TIBBITTS. 

